Journal article
Magdalena Marganska, Piotr Chudzinski, Milena Grifoni
Phys. Rev. B, vol. 92(7), American Physical Society, 2015 Aug, p. 075433
Phys. Rev. B, vol. 92(7), American Physical Society, 2015 Aug, p. 075433
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APA
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Marganska, M., Chudzinski, P., & Grifoni, M. (2015). The two classes of low-energy spectra in finite carbon nanotubes. Phys. Rev. B, 92(7), 075433. https://doi.org/10.1103/PhysRevB.91.155435
Chicago/Turabian
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Marganska, Magdalena, Piotr Chudzinski, and Milena Grifoni. “The Two Classes of Low-Energy Spectra in Finite Carbon Nanotubes.” Phys. Rev. B 92, no. 7 (August 2015): 075433.
MLA
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Marganska, Magdalena, et al. “The Two Classes of Low-Energy Spectra in Finite Carbon Nanotubes.” Phys. Rev. B, vol. 92, no. 7, American Physical Society, Aug. 2015, p. 075433, doi:10.1103/PhysRevB.91.155435.
BibTeX Click to copy
@article{marganska2015a,
title = {The two classes of low-energy spectra in finite carbon nanotubes},
year = {2015},
month = aug,
issue = {7},
journal = {Phys. Rev. B},
pages = {075433},
publisher = {American Physical Society},
volume = {92},
doi = {10.1103/PhysRevB.91.155435},
author = {Marganska, Magdalena and Chudzinski, Piotr and Grifoni, Milena},
month_numeric = {8}
}
Abstract and Figures
Electrons in carbon nanotubes (CNTs) possess spin and orbital degrees of freedom. The latter is inherited from the bipartite graphene lattice with two inequivalent Dirac points. The electronic spectra obtained in several transport experiments on CNT quantum dots in parallel magnetic field often show an anticrossing of spectral lines assigned to the opposite Dirac valleys. So far this valley mixing has been attributed to the disorder, with impurity induced scattering. We show that this effect can arise also in ultraclean CNTs of the armchair class and it can be caused solely by the presence of the boundaries. In contrast, in CNTs of the zigzag class it does not occur. These two fundamentally different classes of spectra arise because of different symmetries of the low energy eigenstates of the two types of CNTs. The magnitude of the level splitting depends in a nonmonotonous way on the distance of the involved energy levels from the charge neutrality point.
